chapter03[1] - Chapter 3 Biological Psychology Biological...

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Chapter 3 Biological Psychology
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Biological Psychology In this chapter we will examine: What are the components of the nervous system? How does the brain create mental processes and behavior?
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The Major Divisions of the Nervous System The Nervous System and Behavior The central nervous system and the peripheral nervous system The central nervous system consists of the brain and the spinal cord. The central nervous system communicates with the rest of the body via the peripheral nervous system.
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The nervous system has two major divisions: 1. the central nervous system 2. the peripheral nervous system. Each of these has major subdivisions, as shown.
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The major divisions of the human central nervous system, as seen from the midline.
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The Major Divisions of the Nervous System The peripheral nervous system is composed of bundles of axons between the spinal cord and the rest of the body. There are two sets of subdivisions of the peripheral nervous system.
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The Peripheral Nervous System The somatic nervous system and autonomic nervous system The somatic nervous system is made up of the peripheral nerves that communicate with the skin and muscles. The autonomic nervous system controls the involuntary actions of the heart, stomach and other organs.
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The Central Nervous System The Spinal Cord The spinal cord communicates with the body below the head by means of sensory and motor neurons . The sensory neurons carry information received from the body to the spinal cord. The motor neurons transmit messages from the central nervous system to muscles and glands.
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The spinal cord receives sensory information from all parts of the body except the head. Motor nerves in the spinal cord send messages to control the muscles and glands.
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The Central Nervous System The Spinal Cord A reflex is a rapid, automatic response to a stimulus. The spinal cord organizes these responses. A voluntary response originates in the brain and travels through the spinal cord to the muscles to carry out the movements.
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The Peripheral Nervous System The Autonomic Nervous System A division of the peripheral nervous system that is closely associated with the spinal cord is the autonomic nervous system . The individual has little voluntary control over this division, thus the name, autonomic . The autonomic nervous system has two subdivisions.
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The Peripheral Nervous System The Divisions of the Autonomic Nervous System The sympathetic nervous system is the crisis management center. It increases heart and respiration rate and prepares the body for fight or flight (emergencies; stress).
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The parasympathetic nervous system is in charge of energy storage . It decreases heart rate
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chapter03[1] - Chapter 3 Biological Psychology Biological...

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